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Exchange 2010 Internal Wireless emails received but not sent

Cathalfp asked
Last Modified: 2014-05-02
Users with mobile devices connected to our internal wireless network are able to receive emial on their device. However, they are unable to send. The sent items just hang in limbo on the devices until they are no longer associated with our wireless network and then they are sent.

The devices are configured to the external mail record:
webmail.company.com and any incoming mail is routed to IP address
XXX.XXX.XXX.23 which is our exchange server

The server is:
and has an internal IP Address of XXX.XXX.XXX.23 we have created a pointer in DNS for webmail.company.com that points to XXX.XXX.XXX.23.

I don't believe this is a DNS issue as the devices can receive email. Not sure what to check next to try and trouble shoot this issue.

Thanks in advance
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